Television – Image signal processing circuitry specific to television – Gray scale transformation
Patent
1997-06-06
1999-08-17
Hsia, Sherrie
Television
Image signal processing circuitry specific to television
Gray scale transformation
348645, 348659, H04N 968
Patent
active
059401443
ABSTRACT:
A device for regulating the luminance signal and chromanance signals of a video image to be converted into red, green and blue color signals. The device includes a conversion matrix and a device for regulating an amplitude of the luminance signal, the blue color difference chromanance signal and a red color difference chromanance signal to be modified by a user adjustment control. The device further includes a device for preventing the color signal having the highest value at the output of the conversion matrix from being able to exceed a saturation value substantially equal to a percentage, preferably 70%, of the white level of the image signal when the color signal reaches the saturation value.
REFERENCES:
patent: 4679072 (1987-07-01), Takayama
patent: 4980756 (1990-12-01), Lagoni
patent: 5619280 (1997-04-01), Yamashita
Patent Abstracts of Japan vol. 000, No. 000 & JP 06 337932 (NEC Corp) Dec. 6, 1994.
Patent Abstracts of Japan vol. 14, No. 391 (E-968), Aug. 23, 1990 & JP 02 145084 A (Hitachi), Jun. 4, 1990.
Hauser Sigrid
Lenz Kuno
Emanuel Peter M.
Hsia Sherrie
Kiel Paul P.
Thomson Multimedia S.A.
Tripoli Joseph S.
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